deer antler spray hit headlines when ray lewis was accused of using the spray to heal an injury. it's banned by the nfl and pga tour. what is deer antler spray? dr. joshua cohen, an endocrinologist at george washington hospital joins us now to hopefully answer our questions. you that for be with us. >> you're welcome. >> what is it? is it derived from deer antlers? >> it is derived from deer antlers and from what is apparently called the the velvet part of the-yard penaltiler, the -- of the antler, the soft covering of the antler, especially in young deer. >> i understand that it's called, for those who are in the know about this, it's igf- 1, or the insulin-like growth factors. we understand the makers say it shouldn't be banned. it has a lot of health benefits. they claim everything from healthy joints to enhancing sex drive and reducing belly fat. on the sorry face, it sounds like a miracle drug. the question s it safe? >> igf-1 is a hormone, a small protein and made naturally in your body. people make it mostly in their liver and other places as well, and it has a role in nor